Develop Reference

Add linearLayout below listView doesn't work

This is not working on my phone but I can see it in the Android Studio Design mode window. I need to place a LinearLayout or any view actually just below the listView. But I can't see it, only the listView fitting the whole height
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:app="http://schemas.android.com/apk/res-auto"
xmlns:tools="http://schemas.android.com/tools"
android:id="#+id/local_detalle_relative_layout"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="vertical"
tools:context="android.buendia.cl.pritz.fragments.locales.LocalDetalleFragment">
<view
android:id="#+id/banner"
class="com.android.volley.toolbox.NetworkImageView"
android:layout_width="match_parent"
android:layout_height="80dp"
android:scaleType="centerCrop"
app:srcCompat="?android:attr/textSelectHandleLeft" />
<TextView
android:id="#+id/current_category"
style="#style/current_category"
android:layout_below="#+id/banner"
android:text="TextView" />
<RelativeLayout
android:layout_width="match_parent"
android:layout_height="match_parent"
android:layout_below="#+id/current_category">
<ListView
android:id="#+id/list_view_local_detalle"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_weight="1"/>
<LinearLayout
android:id="#+id/cart_bar"
style="#style/cart_bar"
android:layout_width="match_parent"
android:layout_height="0dp"
android:layout_weight="1"
android:orientation="horizontal">
<TextView
android:id="#+id/cart_status"
style="#style/cart_bar_status"
android:layout_width="wrap_content"
android:layout_height="match_parent"
android:layout_weight="1"
android:gravity="center_vertical|center_horizontal"
android:text="TextView" />
<Button
android:id="#+id/cart_next"
style="#style/cart_bar_next"
android:layout_width="30dp"
android:layout_height="wrap_content"
android:layout_weight="1"
android:text="#string/cart_bar_next_button_text" />
</LinearLayout>
</RelativeLayout>
</RelativeLayout>

Set android:layout_below="#+id/list_view_local_detalle" for LinearLayout
Note : If you'r using weight for vertical linear layout then height must be 0 dp and if using for horizontal linear layout then width must be 0dp.

How to fill space between two views within a RelativeLayout

I have two views. The top view is set to ...
android:layout_alignParentTop="true"
And the bottom is set to ...
android:layout_alignParentBottom="true"
How can I fill the remaining space with a third view? According to this answer here, I should use a frame layout like this ...
<FrameLayout
android:layout_below="#+id/toplayout"
android:layout_above="#+id/bottomlayout"/>
But then I am required to specify height and width. What height and width am I supposed to specify?

Here is my solution
<RelativeLayout
...
>
<YourLayout
android:id="#+id/toplayout"
android:layout_alignParentTop="true"
/>
<YourLayout
android:id="#+id/bottomlayout"
android:layout_alignParentBottom="true"
/>
<MiddleLayout
<!-- in your case it is FrameLayout -->
android:layout_width="match_parent"
android:layout_height="match_parent"
<!-- or android:layout_height="wrap_content" according to the_profile -->
android:layout_below="#+id/toplayout"
android:layout_above="#+id/bottomlayout"/>
</RelativeLayout>
Hope this help

You could take an advantage of weighting. android:layout_weight property usually fills whatever space is left (or split equally). In your case it would be something like this:
<LinearLayout
android:layout_width="match_parent"
android:layout_height="some_fixed_height"
android:orientation="vertical">
<LinearLayout
android:id="#+id/top_one"
android:layout_width="match_parent"
android:layout_height="wrap_content">
<LinearLayout
android:id="#+id/middle_one_that_fills"
android:layout_width="match_parent"
android:layout_height="0dp"
android:layout_weight="1">
<LinearLayout
android:id="#+id/bottom_one"
android:layout_width="match_parent"
android:layout_height="wrap_content">
</LinearLayout>

As long as your root layout is a RelativeLayout and you're using layout_alignParentTop for the top view and layout_alignParentBottom for the bottom view, like you mentioned, then it should be working with no need for a middle view:
<RelativeLayout
xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="match_parent">
<View
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignParentTop="true"/>
<View
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignParentBottom="true"/>
</RelativeLayout>
Alternatively, if your root view is a LinearLayout, you could use the lesser-known, but aptly-named Space view. Space is:
a lightweight View subclass that may be used to create gaps between components in general purpose layouts.
<LinearLayout
xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="vertical">
<View
android:layout_width="match_parent"
android:layout_height="0dp"
android:layout_weight="1"/>
<Space
android:layout_width="match_parent"
android:layout_height="0dp"
android:layout_weight="9"/>
<View
android:layout_width="match_parent"
android:layout_height="0dp"
android:layout_weight="1"/>
</LinearLayout>

Layout does not align to center of the parent view

Im trying to align a circular image in the middle of two linearlayout with different colors, however the view for some reason does not align to the center
but stick to the left, below it I want to place a fragment. any help?
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="vertical" >
<FrameLayout
android:layout_width="match_parent"
android:layout_height="0dp"
android:layout_weight="3"
android:orientation="vertical" >
<LinearLayout
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="vertical" >
<LinearLayout
android:layout_width="match_parent"
android:layout_height="0dip"
android:layout_weight="1"
android:background="#1b96d9"
android:orientation="vertical" >
</LinearLayout>
<LinearLayout
android:layout_width="match_parent"
android:layout_height="0dp"
android:layout_weight="1"
android:background="#e6e6e6"
android:orientation="vertical" >
</LinearLayout>
</LinearLayout>
<com.mikhaellopez.circularimageview.CircularImageView
xmlns:app="http://schemas.android.com/apk/res-auto"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_gravity="center"
android:layout_margin="10dp"
android:gravity="center"
android:src="#drawable/doge"
app:border_color="#EEEEEE"
app:border_width="4dp"
app:shadow="true" />
</FrameLayout>
<LinearLayout
android:id="#+id/calendarCard1"
android:layout_width="match_parent"
android:layout_height="0dp"
android:layout_weight="7"
android:background="#e6e6e6" />
</LinearLayout>

why not use a relative layout instead of so many nested Linear Layout. Using Relative layouts are easy and efficient. Check this http://www.mkyong.com/android/android-relativelayout-example/ for understanding the relative layouts

Your circular image layout is inside a FrameLayout along with the LinearLayout. FrameLayout basically puts all its children one atop another.

Android: Correctly position buttons inside layout

I have a following layout :
<LinearLayout //container, should adjust height based on CONTENT view height
android:orientation="horizontal"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:baselineAligned="false"
android:clickable="false"
android:padding="20dp">
<RelativeLayout //this is the CONTENT view height
android:layout_width="0dp"
android:layout_height="fill_parent"
android:layout_weight="5">....</RelativeLayout>
...
<RelativeLayout //this is the button layout
android:layout_width="0dp"
android:layout_height="wrap_content"
android:layout_weight="2">
<Button android:layout_width="40sp" android:layout_height="40sp"/>
<Button android:layout_width="40sp" android:layout_height="40sp"/>
</RelativeLayout>
</LinearLayout>
I want the height of the container (LinearLayout) to be adjusted to contain all the views in the RelativeLayout (shown on the left, let's call it CONTAINER).
Then, there are two buttons in the RelativeLayout (shown on the right). I need to align them on top and bottom borders of RelativeLayot, correspondingly. What's really important, is that the height of the buttons' container should be the same (should correspond) to the height of the CONTAINER.
The problem is, if I try to use android:layout_alignParentBottom="true" and android:layout_alignParentTop="true" attributes for the buttons, they will stretch the container height, and it will take the whole screen height.
So, what magic should I use to do the trick? :)

Try to align your right relative layout top and bottom to the left one.
Try something like this:
<RelativeLayout //container, should adjust height based on CONTENT view height
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:baselineAligned="false"
android:clickable="false"
android:padding="20dp">
<RelativeLayout //this is the CONTENT view height
android:id="#+id/contentRL"
android:layout_width="0dp"
android:layout_height="fill_parent"
android:layout_weight="5"
android:layout_alignParentLeft="true">....</RelativeLayout>
...
<RelativeLayout //this is the button layout
android:layout_width="0dp"
android:layout_height="wrap_content"
android:layout_weight="2"
android:layout_alignTop="#id/contentRL"
android:layout_alignBottom="#id/contentRL"
android:layout_alignParentRight="true">
<Button android:layout_width="40sp"
android:layout_height="40sp"
android:layout_alignParentTop="true"/>
<Button android:layout_width="40sp"
android:layout_height="40sp"
android:layout_alignParentBottom="true"/>
</RelativeLayout>

Use this
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:orientation="horizontal"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:baselineAligned="false"
android:clickable="false"
android:padding="20dp">
<RelativeLayout
android:layout_width="wrap_content"
android:layout_height="fill_parent"
android:layout_weight="5"></RelativeLayout>
<RelativeLayout
android:layout_width="wrap_content"
android:layout_height="match_parent"
android:layout_weight="2">
<Button android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignParentTop="true"/>
<Button android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignParentBottom="true"/>
</RelativeLayout>
</LinearLayout>

Ok, based on a hint provided by Damien R. above I successfully accomplished the task by doing following:
Use RelativeLayout as a root with paramters layout_width="wrap_content", layout_height="wrap_content"
Use LinearLayout as a "wrapper" around container RelativeLayouts. This is because I need to lay out these containers using layout_weight attribute.
RelativeLayout layout_height should be fill_parent. No need to use android:layout_alignBottom="#id/..." and android:layout_alignBottom="#id/..." in the RelativeLayout attributes. This will only work if RelativeLayout is a child View of another RelativeLayout, and that's not the case, because I need to use LinearLayout's weight
The code is:
<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:baselineAligned="false"
android:clickable="false"
android:padding="10dp">
<LinearLayout
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:background="#drawable/ticketbackground"
android:id="#+id/ticket_layout"
>
<RelativeLayout
android:id="#+id/contentRL"
android:layout_width="0dp"
android:layout_height="wrap_content"
android:layout_weight="5"
android:layout_alignParentLeft="true">
</RelativeLayout>
<!--second column-->
<RelativeLayout
android:layout_width="0dp"
android:layout_height="fill_parent"
android:layout_weight="3">
...
</RelativeLayout>
<!--third column with buttons-->
<RelativeLayout
android:id="#+id/sdfsdf"
android:layout_width="0dp"
android:layout_height="fill_parent"
android:layout_weight="2">
<Button...
android:layout_alignParentTop="true" />
<Button...
android:layout_alignParentBottom="true" />
</RelativeLayout>
</LinearLayout>
</RelativeLayout>

Android - draw squares in xml

I'd like to draw three squares side-by-side in xml, so that they fill the screen horizontally (minus a margin of 12 dp on each side). According to this post it seems possible to do this messily with table layouts, but I'm wondering if there's a better way. Here's my attempt using nested LinearLayouts, which draws rectangles which fill the entire screen vertically but otherwise does what I'm looking for:
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:layout_margin="12dp"
android:background="#ffffff"
android:baselineAligned="false"
android:orientation="horizontal" >
<LinearLayout
android:layout_width="match_parent"
android:layout_height="match_parent"
android:layout_weight="1"
android:background="#drawable/rectangle" >
</LinearLayout>
<LinearLayout
android:layout_width="match_parent"
android:layout_height="match_parent"
android:layout_gravity="center"
android:layout_weight="1"
android:background="#drawable/rectangle" >
</LinearLayout>
<LinearLayout
android:layout_width="match_parent"
android:layout_height="match_parent"
android:layout_gravity="center"
android:layout_weight="1"
android:background="#drawable/rectangle" >
</LinearLayout>
</LinearLayout>

Try to change the three internal linearlayouts' android:layout_width="match_parent" to "wrap_content".
I just did a test using the following xml code. Notice that, there are two changes from your version:
1 I changed match_parent to wrap_content of the three children layouts.
2 Since I don't have your background image, I just use three different colors for background.
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:layout_margin="12dp"
android:background="#ffffff"
android:baselineAligned="false"
android:orientation="horizontal" >
<LinearLayout
android:layout_width="wrap_content"
android:layout_height="match_parent"
android:layout_weight="1"
android:background="#ff121212" >
</LinearLayout>
<LinearLayout
android:layout_width="wrap_content"
android:layout_height="match_parent"
android:layout_gravity="center"
android:layout_weight="1"
android:background="#ff676767" >
</LinearLayout>
<LinearLayout
android:layout_width="wrap_content"
android:layout_height="match_parent"
android:layout_gravity="center"
android:layout_weight="1"
android:background="#ffababab" >
</LinearLayout>
</LinearLayout>
I get this screen:
So if have changed match_parent to wrap_content but not work, I guess your background image is too big.
Also, turning to the understanding about layout_weight. Layout_weight doesn't decide element's size, it only works after each element has required neccessary size from parent layout, then parent layout assign rest of size to each element according to layout_weight.

Try this way for margins and height.
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:background="#ffffff"
android:baselineAligned="false"
android:orientation="horizontal" >
<LinearLayout
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_weight="1"
android:layout_marginLeft="12dp"
android:background="#drawable/rectangle" >
</LinearLayout>
<LinearLayout
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_gravity="center"
android:layout_weight="1"
android:background="#drawable/rectangle" >
</LinearLayout>
<LinearLayout
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_gravity="center"
android:layout_weight="1"
android:layout_marginRight="12dp"
android:background="#drawable/rectangle" >
</LinearLayout>
</LinearLayout>

It seems the best solution is to create a custom view component with an overridden onMeasure():
protected void onMeasure(int widthMeasureSpec, int heightMeasureSpec) {
super.onMeasure(widthMeasureSpec, widthMeasureSpec);
}